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STY: Update macosx zoom rect styling by greglucas · Pull Request #24367 · matplotlib/matplotlib · GitHub

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STY: Update macosx zoom rect styling #24367

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Merged
tacaswell merged 1 commit into from
Dec 13, 2022
Conversation 15 Commits 1 Checks 0 Files changed
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STY: Update macosx zoom rect styling #24367

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19 changes: 16 additions & 3 deletions src/_macosx.m
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Original file line number Diff line number Diff line change
Expand Up @@ -1330,7 +1330,18 @@ -(void)drawRect:(NSRect)rect
goto exit;
}
if (!NSIsEmptyRect(rubberband)) {
NSFrameRect(rubberband);
// We use bezier paths so we can stroke the outside with a dash
// pattern alternating white/black with two separate paths offset
// in phase.
NSBezierPath *white_path = [NSBezierPath bezierPathWithRect: rubberband];
NSBezierPath *black_path = [NSBezierPath bezierPathWithRect: rubberband];
CGFloat dash_pattern[2] = {3, 3};
[white_path setLineDash: dash_pattern count: 2 phase: 0];
[black_path setLineDash: dash_pattern count: 2 phase: 3];
[[NSColor whiteColor] setStroke];
[white_path stroke];
[[NSColor blackColor] setStroke];
[black_path stroke];
}

exit:
Expand Down Expand Up @@ -1526,9 +1537,11 @@ - (void)otherMouseDragged:(NSEvent *)event { [self mouseDragged: event]; }

- (void)setRubberband:(NSRect)rect
{
if (!NSIsEmptyRect(rubberband)) { [self setNeedsDisplayInRect: rubberband]; }
// The space we want to redraw is a union of the previous rubberband
// with the new rubberband and then expanded (negative inset) by one

QuLogic Nov 8, 2022

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

Just checking if this is in logical space or physical space (i.e., should be one or one * display ratio)?

greglucas Nov 8, 2022

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Choose a reason Spam Abuse Off Topic Outdated Duplicate Resolved Low Quality

On HiDPI, this still clears the region and I'm not sure we want to bring in the deviceScale/contextRegion if we don't absolutely need to here. The linewidth is drawn in points and centered on the rectangle area, so the default linewidth of 1 expands 0.5 points on either side of the rect. (linewidth section from here
https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/CocoaDrawingGuide/Paths/Paths.html#//apple_ref/doc/uid/TP40003290-CH206-BBCDEJGD)
// in each direction to account for the stroke linewidth.
[self setNeedsDisplayInRect: NSInsetRect(NSUnionRect(rect, rubberband), -1, -1)];
rubberband = rect;
[self setNeedsDisplayInRect: rubberband];
}

- (void)removeRubberband
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